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DETERMINING THE SURFACE HARDNESS OF SOME DENSIFIED AND HEAT TREATED WOODS AFTER WATER BASED VARNISHING
(2015) Pelit, Hüseyin; Sönmez, Abdullah; Burdurlu, Erol; Usta, Erol
In this study was aimed at determining the surface hardness of scots pine (Pinus sylvestris L.) and Eastern beech (Fagus orientalis L.) woods to which water-based varnishes were applied after thermo-mechanical densification and heat treatment. Samples; after densifying by compression in the radial direction at 20% and 40% compression ratios, and at 110 °C and 150 °C, samples were subjected to 2 hours of heat treatment at 190 °C, 200 °C, and 210 °C. Then, surface of the samples were varnished with one-component and two-component water-based varnishes. The changes occurring in surface hardness of the samples were determined according to the bases of TS EN ISO 1522. According to results of the study; surface hardness increased 5,1% and 4,9% in densified scots pine and Eastern beech samples, respectively. Decreases were observed in the surface hardness of the samples because of the increase in heat treatment temperature. After the water-based varnish applications, increases of 23% and 5% were obtained in the surface hardness of scots pine and Eastern beech samples, respectively. Moreover, no difference was observed between one and two-component water-based varnishes in terms of surface hardness.